What is grade-A boiler? - Boiler basics - ZOZEN
2021-7-23 · Grade B steam boiler with rated steam pressure less than or equal to 2.5 MPa. Grade C steam boiler with rated steam pressure less than or equal to 0.8 MPa and rated evaporation less than or equal to 1 ton/hour; Hot water boiler with rated outlet water temperature less than 120 degree Celsius.
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